Feature:1. FAST TESTING The oxygen detector can quickly respond to oxygen, and the alarm level can be manually set by light and sound.2. COLOR SCREEN DISPLAY Oxygen monitor with color screen, which is convenient for you reading data. It is very convenient and trouble free.3. ACCURATE AND PROFESSIONAL MEASUREMENT Oxygen detector uses high quality sensors, with good sensitivity and excellent repeatability and short response time.4. USING CONVENIENT Portable oxygen detector has one key temperature switch, more convenient to use and save your labor.5. WIDE RANGE OF USE Handheld oxygen detector is suitable for industrial, agricultural, residential environments and so on.Specification:Item Type: Oxygen DetectorMaterial: ABSModel: AT8100Battery: Lithium battery BPV4MBL5C 3.7V 1000mAh (built in)Uses: Suitable for industrial, agricultural and residential environments and other places.Support Language: EnglishDetection Gas: OxygenTest Range: 0-25%Accuracy: 0.10%Basic Error: 1.5%Temperature Range: -10-50Humidity Range: 1%RH-99%RHResponse Time: 15 secondsRecovery Time: 15 secondsSensor Principle: Electrochemical principleDisplay: Large screen segmented LCD displayAlarm: Sound and light dual alarm. The alarm value and alarm sound can be set separately.Power Supply: 3.7V 1000mAh rechargeable lithium battery (built in)Working Time: >90 hours continuous workWorking Temperature: -10-50Working Humidity: 0-95%RH (non condensing).Package List:1 x Oxygen Detector1 x USB Cable1 x Lanyard1 x Carrying Case1 x ManualNote:The influence of oxygen deficient and oxygen enriched ambinece Oxygen concentration (%) Symptoms (atmospheric pressure) 100% Fatal, 6 minutes (absolutely closed environment, such as hyperbaric oxygen chamber) 50% Fatal and can be cured after 45 minutes of treatment. (Absolutely closed environment, such as hyperbaric oxygen chamber) >23.5% Oxygen enriched 20.96% Normal 19.5% Minimum 15~19% Reduces efficiency, causing problems in the head, lungs and circulatory system 10~12% Shortness of breath, loss of judgment, purple lips 8~10% Treatment failed, syncope, coma, pale complexion, nausea and vomiting 6~8% 8 Minutes, low blood pressure, rapid heartbeat, mouth breathing, stop breathing quickly 4~6% 40 Seconds, convulsions, respiratory arrest, death Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.